From 432673a8ddbe5b62c8a15b7bc0141cf9a303866a Mon Sep 17 00:00:00 2001
From: Petr Zemek <s3rvac@gmail.com>
Date: Fri, 24 Mar 2017 15:47:45 +0100
Subject: [PATCH] Add a missing feature attribute to the example for
 std::process::Command::envs().

The person who originally wrote the example forgot to include this attribute.
This caused Travis CI to fail on commit 9b0a4a4e97 (#40794), which just fixed
formatting in the description of std::process::Command::envs().
---
 src/libstd/process.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libstd/process.rs b/src/libstd/process.rs
index b57a9883afe..d46cf7a26da 100644
--- a/src/libstd/process.rs
+++ b/src/libstd/process.rs
@@ -439,6 +439,8 @@ impl Command {
     /// Basic usage:
     ///
     /// ```no_run
+    /// #![feature(command_envs)]
+    ///
     /// use std::process::{Command, Stdio};
     /// use std::env;
     /// use std::collections::HashMap;